JP2020176476A - Vehicle door opening/closing device - Google Patents

Abstract

To provide a vehicle door opening/closing device with high quietness.SOLUTION: A door opening/closing device 10 comprises a first tubular member 21 and a second tubular member 22 that are arranged coaxially in a state of being able to move relatively in an axial direction. In addition, the door opening/closing device 10 includes a compression coil spring 60 that is interposed between the first tubular member 21 and the second tubular member 22 to bias the first tubular member 21 and the second tubular member 22 in the axial direction. On a circumferential surface 34so of a guide tube 34 that constitutes a peripheral surface S2 of the second tubular member 22 that radially faces the compression coil spring 60, a plurality of ribs 70 that radially protrude outward from the circumferential surface 34so and axially extend.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vehicle door opening / closing device.

Conventionally, there is a door opening / closing device for a vehicle that has a telescopic shaft shape and can hold the open position of the door by being interposed between the vehicle body and the door. Usually, such a door opening / closing device is rotatably connected to the door and the vehicle body at both ends in the axial direction. Then, the door of the vehicle can be opened and closed by expanding and contracting while rotating relative to the rotation connection point.

For example, the door opening / closing device described in Patent Document 1 has a first tubular member and a second tubular member coaxially arranged so as to be relatively movable in the axial direction. Further, a compression coil spring is interposed between the first tubular member and the second tubular member. Then, based on the elastic force of the compression coil spring, the opening position of the back door provided at the door opening at the rear end of the vehicle is maintained by maintaining the axial length thereof.

JP-A-2018-165440

However, the coil spring tends to have a so-called "waviness" in which the shape of the spring is displaced in a radial direction due to compression in the axial direction. Therefore, in the configuration of the prior art, when the compression coil spring is extended based on its elastic force, the compression coil spring faces the compression coil spring in the radial direction, and the peripheral surfaces of the first tubular member and the second tubular member. May be hit by. And since the so-called "repellent sound" generated by this may deteriorate the texture, there is still room for improvement in this respect.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a highly quiet vehicle door opening / closing device.

Vehicle door opening / closing devices that solve the above problems include a first tubular member and a second tubular member that are coaxially arranged so as to be relatively movable in the axial direction, the first tubular member, and the second tubular member. The first tubular member is provided with a compression coil spring that urges the first tubular member and the second tubular member in the axial direction by being interposed between the members, and is opposed to the compression coil spring in the radial direction. It is preferable that at least one of the peripheral surface of the member and the peripheral surface of the second tubular member is provided with ribs that project radially from the peripheral surface and extend in the axial direction.

According to the above configuration, the compression coil spring displaced in the radial direction based on the spring-shaped "waviness" generated by the compression comes into contact with the ribs provided on the peripheral surface facing the compression coil spring in the radial direction to compress the compression coil spring. The contact area of the coil spring can be reduced. Further, this makes it easier for the contact portion of the compression coil spring to slide in the direction in which the compression coil spring extends based on the elastic force, so that the contact portion is caught on the peripheral surface and the elastic force is accumulated. By opening the compression coil spring, it is possible to suppress the occurrence of a phenomenon in which the compression coil spring is largely displaced in the radial direction. As a result, the generation of "repellency" due to the compression coil spring being struck against the peripheral surface of the first tubular member and the peripheral surface of the second tubular member facing each other in the radial direction is suppressed, resulting in high quietness. Sex can be ensured.

Further, there is an advantage that the sound generated by the compression coil spring displaced in the radial direction coming into contact with the rib can also be suppressed to be small based on the ridge shape of the rib.

In the vehicle door opening / closing device that solves the above problems, it is preferable that the ribs are elastically deformable in the radial direction.
According to the above configuration, it is possible to absorb the impact when the compression coil spring displaced in the radial direction comes into contact with the rib. As a result, the generation of the "repellent sound" can be suppressed more effectively.

In a vehicle door opening / closing device for solving the above problems, it is preferable that the rib has a tip portion extending so as to intersect with respect to a direction orthogonal to the peripheral surface on which the rib is provided.
According to the above configuration, when the compression coil spring displaced in the radial direction comes into contact with the compression coil spring, the tip portion bends, so that elastic deformation in the radial direction can be allowed.

The vehicle door opening / closing device for solving the above problems includes a spindle screw and a spindle nut that are screwed together, and the first tubular member is coaxial in a state in which the spindle screw is relatively rotatable and axially immovable. The second tubular member is formed to have a smaller diameter than the housing tube while coaxially supporting the spindle nut in a state where it cannot rotate relative to each other and cannot move relative to the axial direction. An inner tube whose one end side is inserted into the housing tube and a guide tube that moves axially integrally with the inner tube while being fitted onto the inner tube are provided, and the compression coil spring is the guide tube. It is preferable that the rib is provided on the outer peripheral surface of the guide tube.

According to the above configuration, the outer peripheral surface of the guide tube to which the compression coil spring is extrapolated is closer to the compression coil spring in the radial direction than the inner peripheral surface of the housing tube which also faces the compression coil spring in the radial direction. Prone. Therefore, when the compression coil spring is displaced in the radial direction based on the spring-shaped "waviness" generated by the compression, there is a high possibility that the compression coil spring comes into contact with the outer peripheral surface of the guide tube. Therefore, by providing ribs on the outer peripheral surface of the guide tube, it is possible to more effectively suppress the generation of the "repellent sound".

According to the present invention, quietness can be enhanced.

A side view of a vehicle provided with a door opening / closing device. Side view of the door switchgear. (A) is a sectional view of the door opening / closing device, and (b) is an enlarged sectional view. Sectional view of the door switchgear. Perspective view of the guide tube. An enlarged cross-sectional view of the vicinity of the rib provided on the outer peripheral surface of the guide tube. Sectional drawing of the guide tube provided with the rib of another example. A perspective view of a guide tube provided with another rib. An enlarged cross-sectional view of the vicinity of another rib provided on the outer peripheral surface of the guide tube. FIG. 5 is a cross-sectional view of another housing tube provided with ribs on the inner peripheral surface.

Hereinafter, an embodiment of the vehicle door opening / closing device will be described with reference to the drawings.
As shown in FIG. 1, the door opening 2 formed at the rear of the vehicle 1 is provided with a so-called flip-up back door 3 having a rotation fulcrum P at the upper end thereof and operating to open and close. .. A pair of door opening / closing devices 10 having a retractable shaft shape and interposed between the back door 3 and the vehicle body 4 are provided at both ends of the door opening 2 in the width direction.

More specifically, as shown in FIGS. 2 and 3A and 3B, the door opening / closing device 10 of the present embodiment includes the first tubular member 21 and the second tubular member 22 arranged concentrically. I have. The first tubular member 21 and the second tubular member 22 move relative to each other in the axial direction to expand and contract in the axial direction, so that the length in the axial direction can be changed.

Specifically, the first tubular member 21 of the present embodiment includes a housing tube 31 having a substantially cylindrical outer shape and a connecting member 32 fixed to the first end 31a of the housing tube 31. I have. On the other hand, the second tubular member 22 of the present embodiment has a substantially cylindrical inner tube 33 formed having a diameter smaller than that of the housing tube 31 constituting the first tubular member 21, and also the housing tube 31. A guide tube 34 having a substantially cylindrical shape having a small diameter and being fitted onto the inner tube 33 is provided. Further, the second tubular member 22 includes an outer tube 35 formed having a diameter larger than that of the housing tube 31, and a connecting member 36 fixed to the second end portion 35b of the outer tube 35. Further, in the second tubular member 22 of the present embodiment, the inner tube 33 and the guide tube 34 also have their second end portions 33b and 34b fixed to the connecting member 36, respectively. The second tubular member 22 of the present embodiment has a structure in which the inner tube 33, the guide tube 34, and the outer tube 35 arranged concentrically thereof are integrated.

Further, in the door opening / closing device 10 of the present embodiment, the first end portion 33a of the inner tube 33 is inserted into the cylinder of the housing tube 31 via the second end portion 31b of the housing tube 31 that opens in the axial direction. Has been done. Further, the second end portion 31b of the housing tube 31 is also inserted into the cylinder of the outer tube 35 via the first end portion 35a of the outer tube 35 that opens in the axial direction thereof. The door opening / closing device 10 of the present embodiment has a configuration in which the first tubular member 21 and the second tubular member 22 are connected in such a manner that the opening ends of the door opening / closing device 10 are fitted to each other.

In the door opening / closing device 10 of the present embodiment, the first end portion 35a of the outer tube 35 is provided with a seal member 37 that is in sliding contact with the outer peripheral surface 31so of the housing tube 31 outside the cylinder of the outer tube 35. ing. The door opening / closing device 10 of the present embodiment is configured to tightly seal the inside of the cylinders of the first tubular member 21 and the second tubular member 22.

Further, as shown in FIG. 4, in the door opening / closing device 10 of the present embodiment, a plurality of groove portions 38 extending in the axial direction are recessed in the inner peripheral surface 35si of the outer tube 35 at substantially equal intervals in the circumferential direction. ing. Further, on the second end 31b of the housing tube 31 inserted into the cylinder of the outer tube 35, a plurality of housing tubes 31 projecting radially outward from the outer peripheral surface 31so at substantially equal intervals in the circumferential direction and extending in the axial direction. The ridge portion 39 is formed. In the present embodiment, each of these groove portions 38 and each ridge portion 39 is formed by molding the outer tube 35 and the second end portion 31b of the housing tube 31 into a corrugated cross section. Then, the door opening / closing device 10 of the present embodiment fits the groove 38 and the ridge 39, so that the door opening / closing device 10 rotates relative to each other between the first tubular member 21 and the second tubular member 22. It is possible to move the first tubular member 21 and the second tubular member 22 relative to each other in the axial direction while regulating the above.

More specifically, as shown in FIG. 3, the door opening / closing device 10 of the present embodiment is pivotally supported by a bearing 40 provided in the cylinder of the housing tube 31 so that it can rotate relative to each other and is relative to the axial direction. It is provided with a spindle screw 41 provided coaxially with the housing tube 31 in a non-movable state. Further, the door opening / closing device 10 is fixed coaxially with the first end 33a of the inner tube 33 inserted into the cylinder of the housing tube 31, so that the door opening / closing device 10 cannot rotate relative to each other and cannot move in the axial direction. In this state, a spindle nut 42 screwed into the spindle screw 41 is provided. Further, the door opening / closing device 10 includes a drive unit 45 that rotates the spindle screw 41 using the motor 43 as a drive source. The door opening / closing device 10 of the present embodiment has a function as a power back door device 50 capable of opening / closing the back door 3 based on the driving force of the motor 43.

Specifically, in the door opening / closing device 10 of the present embodiment, the drive unit 45 is placed in the cylinder of the housing tube 31 at an axial position on the first end 31a side of the bearing 40 of the spindle screw 41. It is contained. The drive unit 45 of the present embodiment has a configuration in which the motor 43 and the speed reducer 46 are arranged side by side in the axial direction. As a result, the drive unit 45 of the present embodiment can efficiently rotationally drive the spindle screw 41 supported by the bearing 40 in a compact configuration.

That is, as the spindle screw 41 rotates, the screwing position of the spindle nut 42 with respect to the spindle screw 41 is displaced relative to the axial direction. Further, based on the relative displacement of the screwed position, the first tubular member 21 having the housing tube 31 supporting the spindle screw 41 and the inner tube 33 supporting the spindle nut 42 move relative to each other in the axial direction. .. Then, in the door opening / closing device 10 of the present embodiment, the first tubular member 21 and the second tubular member 22 move relative to each other in the axial direction with the rotation of the spindle screw 41, whereby the axial length thereof is increased. The structure is such that the screw expands and contracts.

More specifically, as shown in FIG. 1, in the door opening / closing device 10 of the present embodiment, the connecting member 32 on the side of the first tubular member 21 is rotatably connected to the back door 3 and the second The connecting member 36 on the tubular member 22 side is rotatably connected to the vehicle body 4 and is interposed between the back door 3 and the vehicle body 4. In the vehicle 1 of the present embodiment, when the back door 3 is in the fully closed position, the door opening / closing device 10 has a connection point X1 with respect to the back door 3 located below the connection point X2 with respect to the vehicle body 4. When the back door 3 is in the fully open position, the connection point X1 with respect to the back door 3 is arranged so as to be located above the connection point X2 with respect to the vehicle body 4. As a result, the door opening / closing device 10 of the present embodiment has a configuration in which the axial length is extended with the opening operation of the back door 3 and the axial length is contracted with the closing operation of the back door 3. There is.

Further, the door opening / closing device 10 as the power back door device 50 rotates and drives the spindle screw 41 based on the driving force of the motor 43 to relatively move the first tubular member 21 and the second tubular member 22. .. As a result, the back door 3 can be opened by extending its axial length, and the back door 3 can be closed by contracting its axial length.

Further, as shown in FIGS. 3 and 4, the door opening / closing device 10 of the present embodiment is interposed between the first tubular member 21 and the second tubular member 22, so that the first tubular member thereof is interposed. A compression coil spring 60 that urges the shaped member 21 and the second tubular member 22 in the axial and contradictory directions thereof is provided. In the door opening / closing device 10 of the present embodiment, the compression coil spring 60 is externally attached to the guide tube 34 constituting the second tubular member 22, and the first tubular member 21 and the second tubular member 22 are externally inserted. It is housed in a cylinder. Further, one end of the compression coil spring 60 abuts on the bearing 40 fixed to the housing tube 31, and the other end abuts on the connecting member 36 on the second tubular member 22 side. Then, the door opening / closing device 10 of the present embodiment urges the first tubular member 21 and the second tubular member 22 in the direction in which the axial length thereof extends based on the elastic force of the compression coil spring 60. As a result, the open position of the back door 3 is maintained against the weight of the back door 3.

Further, as shown in FIGS. 4 and 5, in the door opening / closing device 10 of the present embodiment, the outer peripheral surface 34so of the guide tube 34 facing the compression coil spring 60 in the radial direction is radially outward from the outer peripheral surface 34so. A plurality of ribs 70 that protrude and extend in the axial direction are formed. Specifically, the guide tube 34 of the present embodiment is provided with four ribs 70 provided at substantially equal intervals in the circumferential direction. In the door opening / closing device 10 of the present embodiment, each of these ribs 70 is formed of resin integrally with the guide tube 34. Then, in the door opening / closing device 10 of the present embodiment, the compression coil spring 60 in which a "waviness" is generated in the spring shape due to the compression is in sliding contact with each of these ribs 70, so that the compression coil spring 60 is in the radial direction thereof. It is configured to suppress the generation of sound due to being hit against the peripheral surface S1 of the first tubular member 21 and the peripheral surface S2 of the second tubular member 22 facing the above.

That is, when the door opening / closing device 10 extends in the axial direction with the opening operation of the back door 3, the first tubular member 21 and the second tubular member 22 are urged in the direction of extending the axial length thereof. The compression coil spring 60 is also extended based on its elastic force.

Here, if the compression coil spring 60 has a spring-shaped "waviness" due to the compression, the compression coil spring 60 may come into contact with the outer peripheral surface 34so of the guide tube 34 facing in the radial direction thereof. Further, when this contact portion is caught on the outer peripheral surface 34so of the guide tube 34, the elastic force of the compression coil spring 60 to be released by its extension may be accumulated in the contact portion with respect to the outer peripheral surface 34so of the guide tube 34. There is. Further, the elastic force accumulated in the contact portion is released by eliminating the catch, so that the compression coil spring 60 may be largely displaced in the radial direction. As a result, the compression coil spring 60 faces the peripheral surface S1 of the first tubular member 21 and the peripheral surface S2 of the second tubular member 22 facing in the radial direction thereof, that is, the inner peripheral surface 31si of the housing tube 31. And by hitting the outer peripheral surface 34so of the guide tube 34, a so-called "repellent sound" may be generated.

Based on this point, as shown in FIG. 6, in the door opening / closing device 10 of the present embodiment, the compression coil springs 60 displaced in the radial direction are provided on the outer peripheral surface 34so of the guide tube 34 facing the radial direction. It is configured to come into contact with any of the ribs 70. As a result, the contact area of the compression coil spring 60 is reduced, so that the contact portion of the compression coil spring 60 is less likely to be caught on the outer peripheral surface 34so of the guide tube 34.

That is, the compression coil spring 60 contacts the rib 70 in a state in which the spirally extending winding intersects the rib 70 extending in the axial direction of the guide tube 34, that is, in a state close to point contact. As a result, the door opening / closing device 10 of the present embodiment makes it easy for the contact portion of the compression coil spring 60 to slide in the extending direction of the rib 70, that is, in the direction in which the compression coil spring 60 extends based on its elastic force. By doing so, the configuration is such that the generation of the above-mentioned "flicking sound" is suppressed.

Next, the effect of this embodiment will be described.
(1) The door opening / closing device 10 includes a first tubular member 21 and a second tubular member 22 coaxially arranged so as to be relatively movable in the axial direction. Further, the door opening / closing device 10 is interposed between the first tubular member 21 and the second tubular member 22, so that the first tubular member 21 and the second tubular member 22 are axially moved. A compression coil spring 60 for urging is provided. Then, on the outer peripheral surface 34so of the guide tube 34 constituting the peripheral surface S2 of the second tubular member 22 facing the compression coil spring 60 in the radial direction, a plurality of guide tubes 34 protruding outward in the radial direction and extending in the axial direction from the outer peripheral surface 34so. Ribs 70 are provided.

According to the above configuration, the compression coil spring 60 displaced in the radial direction based on the spring-shaped "waviness" generated by compression comes into contact with any of the ribs 70 provided on the outer peripheral surface 34so of the guide tube 34. , The contact area of the compression coil spring 60 can be reduced. Further, this makes it easier for the contact portion of the compression coil spring 60 to slide in the direction in which the compression coil spring 60 extends based on its elastic force, so that the contact portion is caught on the outer peripheral surface 34so of the guide tube 34. It is possible to suppress the occurrence of a phenomenon in which the compression coil spring 60 is largely displaced in the radial direction due to the accumulation of elastic force due to the above and its release. As a result, the generation of "repellency" due to the compression coil spring 60 being struck against the peripheral surface S1 of the first tubular member 21 and the peripheral surface S2 of the second tubular member 22 facing in the radial direction is suppressed. Therefore, high quietness can be ensured.

Further, there is an advantage that the sound generated by the compression coil spring 60 displaced in the radial direction coming into contact with the rib 70 can also be suppressed to be small based on the ridge shape of the rib 70.

(2) In particular, in a configuration in which the compression coil spring 60 is externally inserted into the guide tube 34, the outer peripheral surface 34so of the guide tube 34 is larger than the inner peripheral surface 31si of the housing tube 31 which also faces the compression coil spring 60 in the radial direction. However, the distance between the compression coil spring 60 and the compression coil spring 60 in the radial direction tends to be short. Therefore, when the compression coil spring 60 is displaced in the radial direction based on the spring-shaped "waviness" generated by the compression, there is a high possibility that the compression coil spring 60 comes into contact with the outer peripheral surface 34so of the guide tube 34. Therefore, by providing each of the above ribs on the outer peripheral surface 34so of the guide tube 34, it is possible to more effectively suppress the generation of the “repellent sound”.

(3) The guide tube 34 is made of resin.
According to the above configuration, the manufacturing cost can be reduced by molding each rib 70 with the guide tube 34 by resin. Then, higher quietness can be ensured based on the elasticity of each rib 70 formed of the resin.

The above embodiment can be modified and implemented as follows. The above embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

In the above embodiment, the door opening / closing device 10 has a function as a power back door device 50 capable of opening / closing the back door 3 based on the driving force of the motor 43. However, the present invention is not limited to this, and it has a function as a support member capable of holding the open position of the back door 3 based on the elastic force of the compression coil spring 60 without providing the drive unit 45 using such a motor 43 as a drive source. It may be applied to a manual door opening / closing device. Then, it may be applied to a door opening / closing device used for a vehicle door other than the back door 3.

In the above embodiment, the first tubular member 21 has a single tubular structure including only one housing tube 31 as its tubular body, and the second tubular member 22 is a concentrically arranged inner tube. Although it is decided to have a double-cylinder structure including 33, a guide tube 34, and an outer tube 35, the first tubular member 21 may have a double-cylinder structure. For example, a tubular body such as the guide tube 34 may be arranged inside the housing tube 31 in the radial direction. Further, the inner tube 33 and the guide tube 34 may be integrated as one tubular body having a peripheral surface S2 facing the compression coil spring 60 in the radial direction. The second tubular member 22 does not have a tubular body corresponding to the outer tube 35, but has a single tubular structure having only one tubular body having a peripheral surface S2 facing the compression coil spring 60 in the radial direction. Nor does this exclude the configuration.

In the above embodiment, the ribs 70 having four ribs 70 at substantially equal intervals in the circumferential direction with respect to the outer peripheral surface 34so of the guide tube 34B constituting the peripheral surface S2 of the second tubular member 22 facing the compression coil spring 60 in the radial direction. Was decided to be provided. However, the number and arrangement of the ribs 70 are not limited to this, and may be arbitrarily changed.

Further, as shown in FIGS. 7 to 9, each rib 70B provided on the outer peripheral surface 34so of the guide tube 34B may be elastically deformable in the radial direction thereof.
Specifically, each rib 70B shown in this alternative example is in a direction orthogonal to the outer peripheral surface 34so of the guide tube 34B provided with each of these ribs 70B, that is, in the radial direction of the guide tube 34B (upper and lower in FIG. 9). It has a cross-sectional claw shape having a tip portion 71 extending in a projecting direction intersecting the direction). When the compression coil spring 60 displaced in the radial direction comes into contact with the spring 60, the tip portion 71 bends to elastically deform the guide tube 34B in the radial direction.

That is, by adopting such a configuration, it is possible to absorb the impact when the compression coil spring 60 displaced in the radial direction comes into contact with the rib 70. As a result, the generation of the "repellent sound" can be suppressed more effectively.

Further, as shown in FIG. 10, with respect to the inner peripheral surface 31si of the housing tube 31C constituting the peripheral surface S1 of the first tubular member 21 facing the compression coil spring 60 in the radial direction, the radial direction from the inner peripheral surface 31si. A plurality of ribs 70C that protrude inward and extend in the axial direction may be provided. That is, the coil spring tends to expand its spring shape radially outward due to compression. Therefore, even if such a configuration is adopted, the same effect as that of the above embodiment can be obtained.

When a tubular body facing the compression coil spring 60 in the radial direction is arranged inside the housing tube 31C in the radial direction, a similar rib may be provided on the inner peripheral surface of the tubular body. Further, when the first tubular member 21 includes a tubular body similar to the guide tube 34 arranged inside the compression coil spring 60 in the radial direction, ribs may be provided on the outer peripheral surface of the tubular body. Then, in a state where the door opening / closing device 10 is extended, a similar rib is provided on the inner peripheral surface 35si of the outer tube 35 which is the peripheral surface S2 of the second tubular member 22 facing the compression coil spring 60 in the radial direction. May be good.

That is, at least one of the peripheral surface S1 of the first tubular member 21 and the peripheral surface S1 of the second tubular member 22 facing the compression coil spring 60 in the radial direction protrudes radially from the peripheral surface in the axial direction. It is desirable to provide ribs that extend to.

-In the above embodiment, the guide tube 34 is made of resin, but may be made of other materials such as metal. However, by adopting the structure using the resin, there is an advantage that the manufacturing cost can be reduced by integrally molding the rib 70 and the guide tube 34, and the quietness based on the elastic force of the resin can be improved. Therefore, as in the above alternative example, when ribs are provided on the peripheral surface of the cylinder other than the guide tube 34 that faces the compression coil spring 60 in the radial direction, the ribs and the peripheral surface having the ribs are made of resin. It should be configured.

Next, the technical idea that can be grasped from the above-described embodiment and modified example will be described.
(A) For a vehicle, which has the rib on the peripheral surface of the first tubular member and the peripheral surface of the second tubular member, whichever is closer to the compression coil spring in the radial direction. Door opening and closing device.

That is, when the compression coil spring is displaced in the radial direction based on the spring-shaped "waviness" generated by the compression, the compression coil spring is likely to come into contact with the peripheral surface having a short distance facing the radial direction. Therefore, according to the above configuration, the generation of "repellent sound" can be suppressed more effectively.

(B) A vehicle door opening / closing device, wherein the rib and the peripheral surface having the rib are made of resin.
According to the above configuration, the manufacturing cost can be reduced by integrally molding the rib with the peripheral surface on which the rib is provided. Then, higher quietness can be ensured based on the elasticity of the ribs formed by the resin.

(C) A vehicle door opening / closing device characterized in that the rib is provided on the inner peripheral surface of the housing tube. That is, the coil spring tends to expand its spring shape radially outward due to compression. Therefore, even if such a configuration is adopted, the same effect as that of the above embodiment can be obtained.

(D) A vehicle door opening / closing device characterized by having a plurality of the ribs provided apart from each other in the circumferential direction. Thereby, the generation of "repellent sound" can be suppressed more effectively.

1 ... vehicle, 2 ... door opening, 3 ... back door, 4 ... car body, 10 ... door opening / closing device, 21 ... first tubular member, S1 ... peripheral surface, 22 ... second tubular member, S2 ... peripheral surface , 31, 31C ... Housing tube, 31a ... 1st end, 31b ... 2nd end, 31si ... Inner peripheral surface, 31so ... Outer surface, 32 ... Connecting member, 33 ... Inner tube, 33a ... 1st end, 33b ... 2nd end, 34,34B ... Guide tube, 34b ... 2nd end, 34so ... Outer surface, 35 ... Outer tube, 35a ... 1st end, 35b ... 2nd end, 35si ... Inner peripheral surface , 36 ... connecting member, 37 ... sealing member, 38 ... groove, 39 ... ridge, 40 ... bearing, 41 ... spindle screw, 42 ... spindle nut, 43 ... motor, 45 ... drive unit, 46 ... reducer, 50 ... power back door device, 60 ... compression coil spring, 70, 70B, 70C ... rib, 71 ... tip, P ... rotation fulcrum, X1, X2 ... connection point.

Claims (4)

The first tubular member and the second tubular member coaxially arranged so as to be relatively movable in the axial direction,
A compression coil spring that urges the first tubular member and the second tubular member in the axial direction by being interposed between the first tubular member and the second tubular member is provided.
At least one of the peripheral surface of the first tubular member and the peripheral surface of the second tubular member facing the compression coil spring in the radial direction is a rib that protrudes radially from the peripheral surface and extends in the axial direction. Door opening and closing device for vehicles provided with. In the vehicle door opening / closing device according to claim 1.
A vehicle door opening / closing device characterized in that the rib is elastically deformable in the radial direction. In the vehicle door opening / closing device according to claim 2.
A vehicle door opening / closing device, wherein the rib has a tip portion extending so as to intersect with respect to a direction orthogonal to the peripheral surface on which the rib is provided. In the vehicle door opening / closing device according to any one of claims 1 to 3.
Equipped with spindle screws and spindle nuts that screw into each other
The first tubular member includes a housing tube that coaxially supports the spindle screw in a state where it can rotate relative to each other and cannot move relative to the axial direction.
The second tubular member is
An inner tube in which one end side is inserted into the housing tube by coaxially supporting the spindle nut in a state of being unable to rotate relative to each other and relatively immovable in the axial direction and forming a diameter smaller than that of the housing tube.
A guide tube that moves in the axial direction integrally with the inner tube while being fitted onto the inner tube is provided.
The compression coil spring is externally inserted into the guide tube, and is
Having the rib on the outer peripheral surface of the guide tube,
A door opening / closing device for vehicles characterized by.